River Bend Astronomy Club
- News, events, gallery, and resources located at St. Jacob.
- http://www.riverbendastro.org/

The Fox Valley Astronomical Society
- Club brochure, newsletter, meetings, and education resources located in Wasco.
- http://www.fvastro.org/

Decatur Area Astronomy Club
- Observing aids and programs, educational information, and news.
- http://www.decaturastronomy.com/

The Chicago Astronomer
- Events, information, images, news, and forum.
- http://astronomer.proboards23.com/

Astronomical Society at the University of Illinois
- Images, projects and awards, publications, workshops, past activities, facilities, and equipment located at Champaign-Urbana.
- http://www.astro.uiuc.edu/~uias/

Popular Astronomy Club
- Calendar of events, adopt a star program, start program, newsletter, scrap book, store, and gallery located in Rock Island.
- http://pacastronomy.50megs.com

Peoria Astronomical Society
- News, archives, learning topics, calendar, downloads, gallery, and links.
- http://www.astronomical.org/

Association of Lunar and Planetary Observers
- Publications, training and youth programs, and astronomical, instrument, and computing information located in Springfield.
- http://www.lpl.arizona.edu/alpo/

Twin City Amateur Astronomers
- Calendar of events, archives, club information, and cool links located in Normal.
- http://twincityamateurastronomers.org/

Sangamon Astronomical Society
- Telescope basics, star parties, events, meetings, gallery and links located in Springfield.
- http://www.sas-sky.org

Ryerson Astronomical Society
- Upcoming events, images, galleries, and sources located in Chicago.
- http://astro.uchicago.edu/home/web/RAS/

Northwest Suburban Astronomers
- From the Northwest suburbs of Chicago and includes tips for beginners and reading suggestions, observing information, and gallery.
- http://www.nsaclub.org/

The Naperville Astronomical Association
- Star gazing, club news and calendar, message board, library, and classifieds.
- http://www.stargazing.net/naa/

Lake County Astronomical Society
- The sky, news, beginners corner, dictionary, article archive, astrophotography, archaeoastronomy, and downloads located at Ingleside.
- http://www.bpccs.com/lcas/

Champaign - Urbana Astronomical Society
- Events calendar, looking up, news, helpful hints, and links.
- http://www.prairienet.org/cuas/